1: 95 percent / imidazole / CH2Cl2 / 18 h / Ambient temperature 2: 1) NaOH 2) Ac2O / 1) MeOH, r.t. 2) benzene, 1.5h, reflux (better yield by using the di-K-salt of cpd.12 on a small scale basis) 3: Na / 1 h / 0 °C View Scheme
参考文献
Journal of Organic Chemistry, , vol. 49, # 19 p. 3657 - 3659